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difficulty focusing中文什么意思

difficulty: n. 1.困難；難事，難局，逆境；障礙。 2.異議；爭論 ...
focus: n. (pl. focuses, foci ) 1.【物 ...
be in difficulty: 有困難
difficulty: n. 1.困難；難事，難局，逆境；障礙。 2.異議；爭論，糾葛。 3.〔常 pl.〕財政困難，(經濟)拮據。 be in difficulties 財政困難，經濟拮據。 make a difficulty 不同意，反對。 make [raise] difficulties 刁難。 make no difficulty in (granting the request) 立即同意[應允]。 tide over difficulties 渡過難關。 with difficulty 好容易才，千辛萬苦才。 without difficulty 容容易易就…，輕易。
in difficulty: 處境困難; 困難處境

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His eyes were so tired that he had difficulty focusing them
他的眼睛累了,調節焦距困難。
This is the most popular and hard topic for multinational company , the same its researching difficulties focused on exchange rate predicting and exchange rate risks managing
四、匯率風險預測、管理分析。匯率風險的管理是本文的研究重點，也是跨國公司理財風險管理中難度最大、最普遍的問題。
All of the difficulties focus on the contradiction between mass algorithm and realtime processing . my task is to design a high performance signal processing platform in order to solve it
這些要求基本上體現在大運算量和實時性這一對矛盾的解決上。本課題正是為解決這一矛盾而做的一個通用數字信號處理平臺。
Symptoms of eyestrain include sore eyes and difficulty focusing , poor night vision , difficulty in focusing after concentrating on an object , headaches and sore , red inflamed and weeping eyes
眼睛疲勞的癥狀包括如下：眼睛疼痛，難于集中，夜視非常差，在注視一個物體后重新集中視線很困難，頭痛，眼睛發紅、疼痛、感染、流淚。